1559 search results for "how to import image file to R"

Getting Started With R: A Beginner’s Guide, Part 2

January 16, 2017
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Getting Started With R: A Beginner’s Guide, Part 2

Last week, we installed R and R Studio, and we tried out a few simple R commands in the console. But using R in interactive mode, while powerful, has some limits. Today we are going to learn how to use

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Feature Selection in Machine Learning (Breast Cancer Datasets)

January 14, 2017
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Feature Selection in Machine Learning (Breast Cancer Datasets)

Machine learning uses so called features (i.e. variables or attributes) to generate predictive models. Using a suitable combination of features is essential for obtaining high precision and accuracy. Because too many (unspecific) features pose the prob...

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Animated barplot and google map with R

January 13, 2017
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Animated barplot and google map with R

It might happen that you will need a animated graph of any kind. For purposes of plotting demographic data and changes through the years, Google Maps and plotting maps, merging and converting jpg files into a animated gif, sure will give a nice visualization effect. Here is a sample of changes over the time period … Continue...

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R package dependencies (2017)

January 12, 2017
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R package dependencies (2017)

R package dependencies Erich Neuwirth January 13, 2017 CRAN at the moment (2017-01-13 01:09:18) has 9884 R packages. Quite a few of these packages are required by other packages (by Depends, Imports, or LinkingTo) Required by Packages 0 7549 1-9 1805 10-99 393 100-999 111 1000-1999 18 2000+ 8 So there are 8 packages required

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December 2016 Package Picks

January 11, 2017
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by Joseph Rickert Last month, 217 new packages were submitted to CRAN. By my count this was the highest monthly value recorded for the past nine years. Below, are brief descriptions of fifty-two of these new-for-December packages grouped into six categories: Data, Data Science, Financial Analysis, Statistics, Utilities and Visualizations. The Financial Analysis category is

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Random Forest Classification of Mushrooms

January 10, 2017
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Random Forest Classification of Mushrooms

A post on how to use the randomForest package in R to classify data. This focuses on classifying mushrooms as edible or poisonous.

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Magic reprex

January 10, 2017
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Magic reprex

Making reproducible examples can be hard. There’s a lot of things you need to consider. Like, making sure your environment is clean, the right packages are loaded, the code is formatted nicely, and images are the right resolution and dimension. Get...

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Clustering executed SQL Server queries using R as tool for

January 8, 2017
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Clustering executed SQL Server queries using R as tool for

When query execution performance analysis is to be done, there are many ways to find which queries might cause any unwanted load or cause stall on the server. By encouraging DBA community to start practicing the advantage or R Language and world of data science, I have created a demo to show, how statistics on … Continue...

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Using R sp_execute_external_script with JSON

January 8, 2017
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Using R sp_execute_external_script with JSON

JSON has become part of the SQL Server in the same version as R. Both were very highly anticipated and awaited from the community. JSON has very powerful statements for converting to and from JSON for storing into / from SQL Server engine (FOR JSON and JSON VALUE, etc).  And since it is gaining popularity … Continue...

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Beat the Market with Meucci and Markowitz

January 5, 2017
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Beat the Market with Meucci and Markowitz

  Introduction I am very excited to finally share some of my research exploring Meucci’s (Meucci (2005)) portfolio optimization methods, and how the resulting portfolios compare to the use of historical data. For those unfamiliar with Attilio Meucci, he runs an annual Advanced Risk and Portfolio Managment Bootcamp in New York City every summer. The … Continue...

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